Same thing here, ignoring the fact that the game looked like **** because I had to play on the lowest settings thanks to absolutely no AMD graphics card support, the gameplay was bland and boring as ****.

I felt like it was WAY too easy to make money. After a while, I realized that choosing who I steal money from has no effect, so I just took any money I saw, and you'll get most of the guns within a couple missions.

In my entire playthrough of the game, I think I only went to a gun store once, and that was for a mission. The rest of the time, I just got all of my weapons from enemies.
I also bought every outfit in the game because I had so much money, and nothing to spend it on.